5-0.rb

ActiveRecord::Schema.define do
  create_table :posts, force: true do |t|
  end

  create_table :comments, force: true do |t|
    t.integer :post_id
  end
end

class Post < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :post
end

class PostsController < ActionController::Base
  def index
    Post.all.to_a
    raise "foo"
  end

  def show
    p = Post.find(params[:id])

    render plain: p.id
  end
end

class HelloController < ActionController::Base
  def exception
    raise "An unhandled exception!"
  end

  def reporting
    render plain: Sentry.last_event_id
  end

  def view_exception
    render inline: "<%= foo %>"
  end

  def view
    render template: "test_template"
  end

  def world
    render plain: "Hello World!"
  end

  def with_custom_instrumentation
    custom_event = "custom.instrument"
    ActiveSupport::Notifications.subscribe(custom_event) do |*args|
      data = args[-1]
      data += 1
    end

    ActiveSupport::Notifications.instrument(custom_event, 1)

    head :ok
  end

  def not_found
    raise ActionController::BadRequest
  end
end